1. West China Hospital of Sichuan University Department of Medical Ultrasound and National Clinical Research Center for Geriatrics, , Chengdu, Sichuan, China
2. West China Hospital of Sichuan University Department of Medical Ultrasound, , Chengdu, Sichuan, China
3. Sichuan University National Clinical Research Center for Geriatrics, West China Hospital, , Chengdu, Sichuan, China